Expansion valve



FIG. 1 is a front view of an expansion valve showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines are for the purpose of illustrating portions of the expansion valve and form no part of the claimed design. 

CLAIM The ornamental design for an expansion valve, as shown and described. 